Final answer:
The fill level of the recovery tank can be controlled by adding or removing refrigerant.
Step-by-step explanation:
The fill level of a recovery tank in HVAC (Heating, Ventilation, and Air Conditioning) systems, when using a recovery unit, is primarily controlled by:
3) By adding or removing refrigerant
The recovery tank's fill level is managed by adding refrigerant during the recovery process and removing it when the tank reaches its capacity. As the recovery unit removes refrigerant from the HVAC system, it stores the recovered refrigerant in the recovery tank. Once the tank approaches its maximum capacity, technicians must empty or replace it to continue the recovery process.
While adjusting pressure settings and monitoring temperature are crucial aspects of operating HVAC systems and recovery units, they do not directly control the fill level of the recovery tank. Cleaning the condenser coils is important for maintaining system efficiency but doesn't regulate the fill level of the recovery tank during the refrigerant recovery process.